Performance Evaluation of Multi-carrier Modulation Techniques for Next Generation Wireless Systems

Abstract

Multicarrier modulation techniques are gaining attention to support high data transmission rate in next generation wireless communication systems. With increasing number of users and to support diversified services, more efficient and reliable modulation techniques are required. This work presents a comparative analysis of three multicarrier modulation techniques as OFDM, UFMC and FBMC on the basis of Peak To Average Power Ratio (PAPR) and Power Spectral Density (PSD). OFDM offers comparatively lower value of PAPR but suffers from the limitation of poor spectral efficiency. UFMC, on the other hand provides better spectral efficiency but at the cost of high PAPR. FBMC provides better spectral efficiency and rejection to inter-symbol interference as compared with OFDM but complexity is also increased. In this work, these modulation techniques have been analyzed for variation in FFT size and bits/sub carrier. QAM is used as basic modulation method for performance evaluation of three multicarrier modulation techniques.